Abstract: The Water buffalo is one of main Working animal in China, but ancient old type harness has been seriously affecting development of tractive force. The article will put for ward five designs of newharness through inquiring into physio logical characteristic and some mechanics problem concerneed, tryed out, we chose the "∩" type harness, and introduced the determination basis of each main parameter of the harness. Tne comparative experimentation and productive examination prove that the harness has the feature of good adaptability, lower pressure per unit area, strong ability against fatigue and connience for development of water buffalo tractive force, etc.